blob: 311315b56b611a7b2b9d44a2b930eb8c3b9b8def [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 i2c-dev.h - i2c-bus driver, char device interface
3
4 Copyright (C) 1995-97 Simon G. Vogl
5 Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl>
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20*/
21
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#ifndef _LINUX_I2C_DEV_H
23#define _LINUX_I2C_DEV_H
24
25#include <linux/types.h>
GOTO Masanori3607d1d2005-06-28 20:45:04 -070026#include <linux/compiler.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
David Brownell08fb68b2007-10-13 23:56:32 +020028/* /dev/i2c-X ioctl commands. The ioctl's parameter is always an
29 * unsigned long, except for:
30 * - I2C_FUNCS, takes pointer to an unsigned long
31 * - I2C_RDWR, takes pointer to struct i2c_rdwr_ioctl_data
32 * - I2C_SMBUS, takes pointer to struct i2c_smbus_ioctl_data
33 */
34#define I2C_RETRIES 0x0701 /* number of times a device address should
35 be polled when not acknowledging */
36#define I2C_TIMEOUT 0x0702 /* set timeout in jiffies - call with int */
37
38/* NOTE: Slave address is 7 or 10 bits, but 10-bit addresses
39 * are NOT supported! (due to code brokenness)
40 */
41#define I2C_SLAVE 0x0703 /* Use this slave address */
42#define I2C_SLAVE_FORCE 0x0706 /* Use this slave address, even if it
43 is already in use by a driver! */
44#define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */
45
46#define I2C_FUNCS 0x0705 /* Get the adapter functionality mask */
47
48#define I2C_RDWR 0x0707 /* Combined R/W transfer (one STOP only) */
49
50#define I2C_PEC 0x0708 /* != 0 to use PEC with SMBus */
51#define I2C_SMBUS 0x0720 /* SMBus transfer */
52
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
54/* This is the structure as used in the I2C_SMBUS ioctl call */
55struct i2c_smbus_ioctl_data {
56 __u8 read_write;
57 __u8 command;
58 __u32 size;
59 union i2c_smbus_data __user *data;
60};
61
62/* This is the structure as used in the I2C_RDWR ioctl call */
63struct i2c_rdwr_ioctl_data {
64 struct i2c_msg __user *msgs; /* pointers to i2c_msgs */
65 __u32 nmsgs; /* number of i2c_msgs */
66};
67
68#define I2C_RDRW_IOCTL_MAX_MSGS 42
69
David Brownell08fb68b2007-10-13 23:56:32 +020070#ifdef __KERNEL__
71#define I2C_MAJOR 89 /* Device major number */
72#endif
73
Linus Torvalds1da177e2005-04-16 15:20:36 -070074#endif /* _LINUX_I2C_DEV_H */